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Including a Summary of the Programs Administered by the Department of Agriculture that Influence the Use of the Land
出版U.S. Department of Agriculture, 1939
URLhttp://books.google.com.hk/books?id=n-uJzQEACAAJ&hl=&source=gbs_api
註釋This handbook sets forth a procedure for making a soil conservation survey and includes instructions for mapping the major physical land features essential to the development of a coordinated soil conservation program and for interpreting those features in terms of land use capability. The procedure given is designed to be broad in scope. Variations and supplements to fit local conditions are to be established by the field inspector at the time a survey is initiated.